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Ultra EVM Network Testnet

Add Ultra EVM Network Testnet to Your Wallet — MetaMask, OKX, Rabby, Trust Wallet

Testnet
Chain ID: 18881·Symbol: UOS

Ultra EVM Network Testnet is an EVM-compatible blockchain with Chain ID 18881 and native token UOS. This page lets you add Ultra EVM Network Testnet to MetaMask, Rabby Wallet, OKX Wallet or Trust Wallet in one click — no manual Chain ID or RPC entry required.

RPC Endpoints
https://evm.test.ultra.eosusa.io

Block Explorer

Ultra EVM Testnet Explorer

What is Ultra EVM Network Testnet?

Ultra EVM Network Testnet is an EVM (Ethereum Virtual Machine) compatible blockchain network. Any EVM wallet — MetaMask, Rabby, OKX Wallet, Trust Wallet, Coinbase Wallet — can connect and transact on Ultra EVM Network Testnet once you add the network configuration.

Why do you need to add Ultra EVM Network Testnet to your wallet?

MetaMask and most wallets only come pre-configured with Ethereum Mainnet. To transact, swap tokens, or use dApps on Ultra EVM Network Testnet, you need to add the network first. Entering an incorrect Chain ID or RPC can put your assets at risk. Use the "Add to wallet" button above — data sourced directly from chainid.network, the canonical Ethereum chain registry.

How to add Ultra EVM Network Testnet to your wallet

  1. 1

    Click Add to wallet

    Press the "Add to wallet" button above. MetaMask, OKX Wallet, Rabby Wallet or Trust Wallet will show a popup asking you to confirm adding the Ultra EVM Network Testnet network.

  2. 2

    Confirm in your wallet

    Your wallet shows the Ultra EVM Network Testnet network details: Chain ID 18881, native token UOS. Verify the Chain ID is correct, then click "Approve" or "Add Network".

  3. 3

    Switch to the new network

    After confirming, your wallet automatically switches to Ultra EVM Network Testnet. You can start transacting right away — you will need UOS to pay gas fees.

Ultra EVM Network Testnet network technical details

To add manually, go to Settings → Networks → Add Network in MetaMask (or your wallet's equivalent) and enter the details below:

NameUltra EVM Network Testnet
Chain ID18881
Native tokenUOS
Decimals18
RPC Endpointhttps://evm.test.ultra.eosusa.io
Block Explorerhttps://evmexplorer.testnet.ultra.io

Important notice

  • •Always verify Chain ID 18881 before confirming — attackers sometimes create fake networks with similar names but different Chain IDs
  • •You need UOS tokens in your wallet to pay gas fees for transactions on Ultra EVM Network Testnet
  • •Data on this page is sourced from chainid.network — the community-verified Ethereum chain registry
  • •If the "Add to wallet" button doesn't work, your wallet may not support wallet_addEthereumChain — add the network manually using the details below

Frequently asked questions

Is it safe to add Ultra EVM Network Testnet to MetaMask?▾
Yes, if you use the "Add to wallet" button on this page. Data is sourced from chainid.network — the community-audited Ethereum registry. Adding a network does not expose your private key or grant any permissions to the dApp.
What is Ultra EVM Network Testnet Chain ID?▾
The Chain ID of Ultra EVM Network Testnet is 18881. This unique number identifies the network and prevents MetaMask and other EVM wallets from mixing up transactions across different chains.
Do I need UOS tokens to use Ultra EVM Network Testnet?▾
Yes. Every transaction on Ultra EVM Network Testnet requires UOS to pay gas fees. You can purchase UOS on exchanges and bridge it to Ultra EVM Network Testnet, or use a faucet if this is a testnet.
What is the Ultra EVM Network Testnet RPC endpoint?▾
An RPC endpoint is the server address your wallet uses to communicate with the Ultra EVM Network Testnet blockchain — sending transactions, reading balances, and checking state. One popular Ultra EVM Network Testnet RPC is https://evm.test.ultra.eosusa.io. This page shows live latency for each RPC so you can pick the fastest one.
My wallet says Ultra EVM Network Testnet already exists when I click Add — what do I do?▾
That's completely normal. If Ultra EVM Network Testnet is already in your wallet, it will simply switch to that network instead of adding a duplicate — no error or conflict.
I added Ultra EVM Network Testnet but the network won't load — what's wrong?▾
The most common cause is a broken or overloaded RPC endpoint. Your wallet uses RPC to connect to the blockchain — if the RPC is down, the network won't load even if it was added correctly. Fix: copy a different RPC from the list above (prefer green low-latency ones), then go to Settings → Networks in your wallet and replace the old RPC with the new one. Watch the tutorial video above for step-by-step instructions on updating your RPC.